Applies To:
  • CitectSCADA 4.x, 5.x

A problem has been noted with the SQDNET driver and some older SQUARE D 650 and 450 processors. The SQDNET driver uses a third party software communications server called SoftHub-32. It was found in one instance, that communication between the SoftHub-32 server and an older model 650 PLC was not possible unless the drop number of the SoftHub-32 server was set to 99.

We found this problem went away when newer model PLC's were tried.